Uh I learned to be literate by reading all the comic books in queens public library. I was 15 or so then. I spoke like… a 8 year old native Korean. Which is good, but not great. I was able to see the words I always heard and spoke. I was born into a Korean family in America.
If you don’t know where to start, I suggest learning the alphabet. Ajumma2 posted a link up there somewhere.
Other than that practice your poor Korean on Koreans and insist they use Korean on you too! It helps loads especially if they can offer you feedback. Subbing on Viki also helped me because I have to hear and understand every word. (but baby steps).
I think watching tv in Korean with Korean subs is helpful. Goodbye Mr. Black has Korean subtitles!
Hope this helps!